Let us say a package forks. Or there are two packages that provide
much similar functionality. I want to say that my package depends
on having one or the other of the packages. How would I do that?
A concrete example would be:
requires nose 0.11.1 or greater OR py.test 1.1.1 or greater
(because what I have written is a plugin that works with either,
but requires a py.test or a nose that is recent enough to have
the plugin architecture)
Laura